Suchovenator cancovorem
Once a population of Rostrovenator parvus nested in Zone J, some of them realized that there was an easier food source to exploit; this area was colonized with terracrabbids, small crab-like organisms that were remotely similar to the armored prey they already fed upon. Some individuals would attempt to ambush these by hiding in the water and waiting for one to come towards it to refill its gills. So, they evolved to depend on these terracrabbids, even crawling up onto the land if ambush attempts are unsuccessful.
As Rostrovenator parvus was naturally suited for life in the oceans, these settlers would grab the terracrabbids before dragging them into the water to finish them off. Eventually, they used their teeth to the point of just using those to kill their prey and eat it by crushing the carapace, and their bony snout protrusions lost their purpose, noticeably reducing in size. The top feathers of Rostrovenator cancovorem are lighter in color so that they do not absorb as much heat in this barren equatorial zone. The tail fluke has reduced on the bottom to prevent drag while crawling on the rocks of Zone J, and the top is also smaller as it is not used as often for swimming purposes. The countershaded part of its belly is also smaller because of this.
Rostrovenator cancovorem is relatively unchanged in size from its ancestor, at one-hundred ten centimeters (110 cm) in length, slightly smaller to lose more heat than its ancestors, although it will head back into the water whenever it wishes to cool. They do not dive underneath the water to catch helids unless they are close to the shore, instead feeding on Terracrabus primacrabbus, Terracrabus primacrushus, and Terracrabus killacrabus. If they are in the water to cool down, they will ambush them, but they may also crawl onto the land for access to terracrabbids too.
Rostrovenator cancovorem reproduce at the beginning of wet season, and the female has one large egg that is oxygenated by structures in the womb that contain blood vessels. Adult males and females are sexually dimorphic with differently colored skin, while immature calves have white feathers and peachy-colored skin. Females give birth on rocks and have a gestation period of six (6) weeks. The calf sticks alongside its mother for nourishment, who will regurgitate some of her food for the calf to eat. The calf will also cling onto its mother when she must go on land with its front fins, lest it may risk being separated from her or being predated. The calf will typically mature and leave after seventeen (17) weeks, reduced from the former eighteen (18) weeks because of the smaller size.
